A New Mechanism for Sympathetic Cooling of Atoms and Ions in Atomic and
Ion-Atomic Traps
- URL: http://arxiv.org/abs/2112.08081v1
- Date: Wed, 15 Dec 2021 12:36:51 GMT
- Title: A New Mechanism for Sympathetic Cooling of Atoms and Ions in Atomic and
Ion-Atomic Traps
- Authors: V.S. Melezhik
- Abstract summary: We show that the effect of "micromotion" on sympathetic cooling can be suppressed in the vicinity of atom-ion confinement-induced resonances (CIRs)
We also show that it is possible to improve the efficiency of sympathetic cooling in atomic traps by using atomic CIRs.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Sympathetic cooling of a Fermi gas with a buffer gas of bosonic atoms is an
efficient way to achieve quantum degeneracy in Fermi systems. However, all
attempts to use this method for cooling ions until recently were ineffective
because of the unremovable ion `"micromotion" in electromagnetic Paul traps,
which prevents the realization of a number of hot projects with cold atom-ion
systems. In this regard, we propose a new efficient method for sympathetic
cooling of ions: the use for this purpose of cold buffer atoms in the region of
atom-ion confinement-induced resonances (CIRs) [V.S. Melezhik, Phys. Rev. A103,
53109 (2021)]. We show that the destructive effect of "micromotion" on its
sympathetic cooling can, however, be suppressed in the vicinity of the atom-ion
CIR. Here, the resonant blocking of a close collision of an atom with an ion
also resists its heating due to "micromotion". We investigate the effect of
sympathetic cooling around CIRs in atom-ion, and atom-atom confined collisions
within the quantum-quasiclassical approach using the Li-Yb$^+$ and Li-Yb
confined systems as an example. In this approach, the Schr\"odinger equation
for a cold light atom is integrated simultaneously with the classical Hamilton
equations for a hotter heavy-ion or atom during a collision. We have found the
region near the atom-ion CIR where the sympathetic cooling of the ion by cold
atoms is possible in a hybrid atom-ion trap. We also show that it is possible
to improve the efficiency of sympathetic cooling in atomic traps by using
atomic CIRs.
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